Stop for oil well casing and tubing



p 1940- B. .1. FESTERVAN ET AL 13,580

-' STQP FOR 01L WELL CA'SING' AND TUBING Filed Oct. 25. 1938 2Sheets-Sheet 1 3, 1940. a. J. FESTERIANV 2,213 58 STOP FOR OIL WELLCASING AND TUBING Filed Oct. 25, 1938 -2 Sheets-Sheet 2 WWW PatentedSept. 3, 1940 2,213,580 STOP FOB. on. WELL CASING AND TUBING "FATE NTOFFICE Benjamin J Festervan and Nathan Henderson,

Monroe City, Tex.

Application October 25, 1938, Serial No. 236,862

6 Claims.

The present invention isdir'ected to a stop, adapted to be inserted intubing or in casing for any desired purpose in oil wells. Moreparticularly it is directed to a stop especially suited for use inconjunction with the paraflin drill described in co-pending application,Serial No.,

The principal object of the present invention is the provision of a stopof the character described having a main body portion on which areslidingly mounted slips having serrated edges which upon separation orspreading apart are adapted to engage the walls of the tube or casing inwhich-the stop is to be set and hold the stop in position againstdownward shocks.

An additional object of' the present invention I the provision of a.stop of the character described which is adapted to be set in place byan upward jar rather than by a downward jar.

A further object of the present invention is the provision of a stop ofthe character described which is so constructed as to set more firmly inplace by any impact it receives from above.

Another object of the present invention is the provision of a' stop ofthe character described having an inside fishing recess.

An additional object of the present invention is the provision of a stopof the character described in which the setting mechanism-is containedonthe inside and is provided with can be sheared by a jar.

Further objects and advantages of the present invention will be apparent-from the following detailed description of the accompanying drawings inwhich-'- Figure 1 is a side view of the whole assembly as it is loweredinto the tubing; l

Figure 2 is a side view, partly in section, of the assembly, turned 90from the position shown Figure 1, with the theyassume when thesettingoperation is about completed; g Y

' Figure 3 is a side view of the setting tool;

Figure/1 is a detail of the spring lock for hold= ing the parts in theposition shown in Figure-1,;

Figure .5 is a detail of the ring member provided for holding the slipsprings, the setting tool and the shear pin; and

-Figure 6 is a detail of the spring arm of one of the slips.

" Referring to the drawings indetail, numeral I -i designates a mandrelhaving integrally formed at its small end an open cylinder 2, provided ashear pm which parts shown in the position -a longitudinal bore 4 in themandrel. Slidingly carried by the inside of the cylinder is a ringmember 5 provided with ears 6 which ride along the edges of slot 3; andprovided with diametrically opposed holes 1 adapted to receive a shearpinas hereinafter described." The serrated slips 8 are carried againstthe sides of the mandrel .by spring arms 9, each slip being providedwith a spring arm. Each spring arm 9 is arranged to cover a slot 3 andis provided at its lower end 10 with an indented portion I 0 adaptedtofit between the ears 6 and with an arcuate element It adapted to abutagainst the lower edges of the ears 6. The arcuate element is ofsufiicient length to extend beyond' both sides of slot 3 and 15 iscarried inside the cylinder whereby the spring arms are held in placebetween ears 6 and, are

caused to movel with ring member 5.

The mandrel hasat its outer end a cavity l2 provided with shoulder l3thepurpose of which .20.

as to extend from the 'end of the mandrel to the bottom of cylinder 2.Intermediate its ends barrel-J8 is provided with a circumferentialgroove 19 adapted to receive bolt 15. The barrel passes through theopening in ring member 5' and is 35 provided with a diametrical bore 20adapted to align with bores 1 in ring-member 5 and receive a shear pin2|. At its outer end barrel I8 is provided with a collar 22 adapted toabut against the end of the mandrel and is'exterially threaded 40 f at23 so as to receive the end of. the tubing.

R With the parts shown in the position shown in Figure. 1 the assemblyis lowered into the well at the end of a wire line or a string of tubingwhich includes conventional; jars. point is reached at which itisdesired to set the stop; the tubing is given an upward -jerk therebyimparting an upward jar to the barrel I8; ,This disengages bolt l5 fromgroove I 9 and permits the mandrel and cylinder to slide downwardlyalongthe barrel whereby the slips move upwardly alo'ngthe mandrel andare pressed outwardly un- .'til they engage the casing. When this occursthe momentum of the mandrel is such as to cause the slips to bite intothe walls oi. the casing and hold in said opening. This barrel is of alength such 30 When the- 45 the assembly securely. Then the tubing isgiven a downward jar which shears ofi pins 2| releasingbarrel 18 fromring member 5. The tubing 'is then withdrawn taking the barrel with itand leaving the stop in place. When it is desired to remove the stop asuitable fishing tool is lowered into the interior of the mandrel, saidtool being provided with shoulders to engage shoulder I3. When thisengagement is made an upward jerk will release the slips from the casingand permit the assembly to be withdrawn.

It will be understood that the above described device is relied upononly as an illustration of the present invention and not as a definitionof the scope of said invention. Various changes in arrangement, and sizeand shape of parts will be apparent to those. skilled in the art and arecon templated the scope of the appended claims in which it is intendedto. claim the present invention as broadly as the prior art permits.

We claim: 4

1. A stop adapted to be set at any selected point in 'a casingcomprising a mandrel, slips mounted for sliding movement on saidmandrel, arms carried by said slips, a barrel arranged within saidmandrel, means, releasable by a jar longitudinally applied to saidbarrel, for securing said barrel to said arms, and means, releasable byan upward jar on said barrel, for. normally holding said barrel in afixed relation to said mandrel.

2. A stop adapted to be set at any selected point in a casing comprisinga mandrel having a central axial passage, a cylinder fixed to one end ofsaid mandrel having its interior coaxial with and communicating with thepassage in said mandrel, a ring mounted in said cylinder for movementlongitudinally thereof, spring arms carried by said ring, slips carriedby said arms and mounted for sliding movement on said mandrel, a barrelarranged in the passage in said mandrel and extending into saidcylinder, a shear pin connecting said ring to said barrel, and meansreleasable by an upward jerk onsaid barrel for normally holding saidbarrel in a fixed relation to said mandrel.

3. A stop adapted to be set at any selected point in a casing comprisinga body portion in-'- cluding a mandrel having its small end terminatingin a cylinder the interior of which is coaxial with and communicateswith said bore, said'cylinder being of larger diameter than the small aring member mounted in said cylinder, spaced ears on said ring memberadapted to project outwardly through said out out portions and slidealong the longitudinal edg'es'thereof, spring arms arranged to travelinsaid out out portion, notches in one end of each of said spring arms toreceive said ears, a slip carried by the other end of each spring armand adapted to slide on said mandrel, a barrel adapted to be arrangedwithin the bore of said mandrel and extend into said cylinder, a shearpin connecting one end of said barrel with said ring, a threaded nippleon the other end of said barrel, a circumferential groove on said barrelintermediate its ends and a bolt carried by said body normally springpressed inwardly-to engage said groove and hold said barrel in a fixedrelation to said mandrel.

4. A stop adapted to be set at any selected point in' a casingcomprising a mandrel, slips mounted for sliding movement on saidmandrel, arms carried by said slips, a barrel arranged within saidmandrel, and means, releasable by a jar longitudinally applied to saidbarrel, for securing said barrel to said arms.

5. A stop adapted 'to be set at any selected point in a casingcomprising a mandrel having a central axial passage, a cylinder fixed toone end of said mandrel having its interior coaxial with andcommunicating with the passage in said mandrel, a ring mounted in saidcylinder for movement longitudinally thereof, springarms carried by saidring, and slips carried by said arms and mounted for sliding movement onsaid mandrel.

6. A stop adapted to be set at any selected point in a casing comprisinga body portion including a mandrel having its small end terminating in acylinder, the interior of which is coaxial with and communicates withsaid'bore, said cylinder being of larger diameter than the small end ofsaid mandrel and having its upper end projecting laterally of said smallend, diametrically opposed longitudinal cut-out portions beginning atthe top end of said cylinder and extending to a point adjacent thebottom thereof, a.

ring member mounted in said cylinder, spaced ears on said ring memberadapted to project outwardly through said cut-out portions and slidealong the longitudinal edges thereof, spring arms arranged to travel insaid cut-out portion,

notches in one end of each of said spring arms to receive said ears, anda slip carried by the other end of each spring arm and adapted to slideon said mandrel.

NATHAN F. HENDERSON. BENJAMIN J. FESTERVAN.

